Paint composition.



Iio Drawing.

T D STATES FATE.

OFFICE,

BENJAMIN T. BROOKS AND FRED W. PADGETT, F PITTSBURGH, PENNSYLVANIA,ASSIGNORS T0 GULF REFINING COMPANY, OF PITTSBURGH, PENNSYLVANIA, A

CORPORATION OF TEXAS.

Y PAINT COMPOSITION.

To all whom it may concern:

Be it known that we, BENJAMIN T. BROOKS and FRED W. PADGETT, bothcitizens of the United States, residing, respectively, at Pittsburgh,Allegheny county, State of Pennsylvania, have invented certain new ingof surfaces of cement and concrete,

wherein the free lime present exerts a saponifying action upon theoleaginous vehicle usually employed in compounding the paint, with theresult that the paint layer after being applied to the concrete orcement surface loses adhesion tends to peel ofi.

In accordance with the present invention, we employ as the oilconstituent or vehicle of the paint compositions anon-sa onifiableacid-free hydrocarbon capable o absorbing oxygen with the formation of adry film, i. e., a film such as is given by linseed oil. Such ahydrocarbon may be prepared by introducing olefin'groups into ahydrothereto and carbon oil of sufficiently high boiling point not to betoo volatile, or by removing the acid or carboxyl group from a dryingoil, such as linseed or china-wood oil.

In preparing the non-saponifiable hydrocarbon product from petroleum, wepreferably select a petroleum of the grade known commercially as Solaroil, that is to say, petroleum of a grade intermediate between the morecostly lubricating oil and the more volatile kerosene, and which has aboiling point higher than approximately 250 C. In the treatment of sucha petroleum we first chlorinate it, with a the formation of a dichlorid,and with hydrochloric acid as by a by-product, and we then dissociatethe dichlorid at .a high temperature (say from 350 C. to 550 0.)preferably in the pres= ence of a catalyst such as barium chlorid,

I the operation being also preferably conduct- Specification of LettersPatent.

Application filed August 10, 1914. Serial No. 855,981.

ed in 120mm, with or without the dilutionfof the vapors by an inert gasor vapor such as nitrogen or steam. The dissociation of the with any oneof a number of different ways.

For instance, a lime salt or soap may be dlstllled preferably in 'vacuo-(say 20 mm.) with free llme, in accordance with the equation:

1 Or, an aqueous solution of an alkali soap (potash or soda soap) may beelectrolyzed, according to the following equation:-

I Or, free linseed acids may be distilled and brought into contact witha catalyst (such as manganous oxid, ferric oxid, or alumina) at hightemperatures, as, for instance, 400 C. .to 500 0., according to theequation s. ncn,co=H- RCH3+CO2.

In the three foregoing equations, the symbol R refers'to a hydrocarbonradical containing two olefin bonds.

The non-saponifiable, non-volatile, unsaturated hydrocarbon productobtained either from petroleum, or from a drying oil, may be compoundedwith a paint pigment, in such manner as to make up a paint compositionappropriate for use as a surface coating. As thus compounded, theresultant paint mixture may be applied to concrete and cement surfacesin the usual manner, with the assurance that any free lime contained inthe concrete or cement cannot affect the vehicle or body of the paint.Moreover, the said vehicle for the paint, being acid-free, will itselfbe neutral to the surface to which it is applied, and to the paintpigment, and will consequently. introforming hydrocarbon drying oil;substanon duce no disturbing complications either in tiaily asdescribed.

the manufacture of the paint composition In testimony whereof We aflixour signa- 15 or in its application as a coating either to tures, inpresence of two Witnesses.

5 concrete or to other surfaces. v BENJAMIN T. BROOKS.

' What Weclaim is: FRED W. PADGETT. r 1,. A paint composition having asits ve- Witnesses for B. T. Brooks:

hicle a non-saponifiable non-volatile hydro- DAVID B. DAY; carbon dryingoil; substantially as 5 de- RUSSELL J. BURT. l0 scribed. I WitnessesforFred W. Padgett: 2. A paint composition having as its ve- M. O. MOORE,

hicle an unsaturated non-saponifiable film C. H. HRBISONQ

